共查询到18条相似文献，搜索用时 234 毫秒
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射箭是以命中环数为比赛目的技能主导类表现准确性项目。在技术中,撒放技术是最重要的一个环节,它是整个射箭技术的精髓,撒放动作的正确与否直接影响着命中率。本文以专家访谈、问卷调查、实地观察为主要研究方法,通过对64名国家射箭优秀运动员的注意方式、撒放时机和勾弦方式等几个方面进行调查,并分析了撒放技术中几个主要要素指标与成绩的关系,最后得出以下结论：（1）轻松、稳固的勾弦;适宜的撒放时机,是创造良好成绩的重要因素;（2）在无意识状态下完成撒放动作,能减少心理的干扰;（3）自然快捷的脱弦,一般拉弓靠位到撒放在三秒左右最佳。 相似文献
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射箭技术评价指标的综合研究 总被引：2，自引：0，他引：2
方法:运用Qualisisy红外光点测试系统、Footscan足底压力测试系统、Noraxon肌电遥测系统等对国家队射箭队运动员进行测试,对运动员的射箭动作技术进行分析。结论:1)姿态角、肌肉用力激活程度、举弓阶段主要用力肌肉激活顺序、举弓、开弓时间等的一致性可作为射箭技术评价指标;2)各动作阶段所用时间的长短不能作为技术评价指标,但开举弓时间比与中国国家队射箭成绩正相关;3)基础平衡的足底压力中心指标可作为身体素质、选材及成绩预测的参考依据;4)射箭运动员实射时身体在前、后方向上的稳定性较差,主要与腹背肌力量的不均衡及没有专业运动鞋有关;5)运动学及肌电学都表明,中国射箭训练对举弓、开弓阶段的重视不够,背部肌肉用力特征不明显,撒放技术合理性不高。建议:1)快节奏只是个别运动员的特点,不能因为团体比赛时限缩短而过多强调快节奏。2)采用振动法或不稳定支撑面的力量训练方法进行力量训练。因为这两种训练方法不仅可增加肌肉力量,而且可使神经肌肉的协调性、本体感受器得到训练,从而增强对射箭动作的感觉能力;3)为射箭运动员定制或选择有防滑块鞋底、前后上翘程度符合运动员脚型特点的射箭专用鞋。 相似文献
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射箭运动是一项技巧性非常强的项目,基本技术包括站立、开弓、动作到位、瞄准中的继续用力、撒放、收势六部分组成,射箭动作中每一个动作都是非常重要的,如果有一个动作脱节将会影响整套动作的质量,因此青少年射箭运动员要想以后在 相似文献
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射箭撒放动作的技术分析 总被引：3，自引：0，他引：3
射箭撒放动作的技术分析许爱秋，周茂城随着射箭运动的不断发展，射箭的动作技术也有了进一步的改进和完善。撒手在射箭运动中是一个关键的动作技术，它的正确与否影响着箭的准确性。因此就撤放的动作技术进行探讨分析，可望有助于训练。１合理正确的撒放动作在射箭时，合... 相似文献
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一、问题的提出随着现代射箭运动的发展,作为技术动作精确度和一致性的保证,撒放技术的好坏已成为射手技术水平高低的一个重要标志和能否成为优秀射手的重要条件。因此,深入探讨撒放技术的原理,探讨最佳撒放技术和 相似文献
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研究目的:定量研究特定运动员某阶段射箭训练中各影响因素对中靶情况的作用,为改进训练提供依据。方法:用自行设计的射箭运动训练多参数实时同步检测系统对训练中的瞬时心率曲线、弓片应变、撒放时间、动作视频、靶视频、箭初速等参数进行实时同步检测,在非线性时变目标向量函数模型的一阶简化基础上,估算各影响因素的扰动量。结论:对两名运动员实测分析表明,撒放时间、心率等因素对不同运动员中靶的影响不同,为运动员个性化训练提供了参考方向。 相似文献
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目的通过观察不同运动等级散打运动员在使用鞭腿技术动作时,支撑腿踝关节运动学特征所出现的差异,探求运动学特征与外侧副韧带急性损伤风险的关系。方法运用VICON Nexus 3D红外运动捕捉系统和Kistler地面测力系统,对23名不同运动等级男子散打运动员在使用鞭腿技术时支撑腿踝关节的动作轨迹进行采集,依据运动链原理将运动轨迹划分为启动、击打、回收3个时段,利用VICON Polygon分析软件对每个时段踝关节的角度、角速度、位移、时间、速度等特征进行分析。结果在击打过程中,不同运动等级运动员踝关节的运动方向一致,踝关节的活动度却出现了差异,启动和回收时段的内翻角度存在显著性(P<0.05);一般运动员踝关节的动作时间、位移均大于优秀运动员,启动时段的动作时间、上下位移、动作速度存在显著性(P<0.05)。结论不同运动等级散打运动员支撑腿踝关节的运动学特征存在显著性差异,优秀运动员踝关节运动轨迹的稳定性整体上好于一般运动员;运动学特征与引发外侧副韧带急性损伤风险存有关联,一般运动员因踝关节活动度相对较大,引发外侧副韧带急性损伤的风险也相对较高;启动时段是引发踝关节外侧副韧带急性损伤风险的最大时段。 相似文献
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Recurve archery is an Olympic sport that requires extreme precision, upper body strength and endurance. The purpose of this research was to quantify how postural stability variables both pre- and post-arrow release, draw force, flight time, arrow length and clicker reaction time, collectively, impacted on the performance or scoring outcomes in elite recurve archery athletes. Thirty-nine elite-level recurve archers (23 male and 16 female; mean age?=?24.7?±?7.3 years) from four different countries volunteered to participate in this study prior to competing at a World Cup event. An AMTI force platform (1000Hz) was used to obtain centre of pressure (COP) measurements 1s prior to arrow release and 0.5s post-arrow release. High-speed footage (200Hz) allowed for calculation of arrow flight time and score. Results identified clicker reaction time, draw force and maximum sway speed as the variables that best predicted shot performance. Specifically, reduced clicker reaction time, greater bow draw force and reduced postural sway speed post-arrow release were predictors of higher scoring shots. It is suggested that future research should focus on investigating shoulder muscle tremors at full draw in relation to clicker reaction time, and the effect of upper body strength interventions (specifically targeting the musculature around the shoulder girdle) on performance in recurve archers. 相似文献
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对我国优秀女子铁饼选手最后用力技术的运动学分析 总被引：10，自引：0，他引：10
掷铁饼技术的最后用力是整个技术过程的关键环节。采用高速同步摄影与影片三妥析的方法,对我国部分优秀女子铁饼选手的投掷技术进行测试,取得所需技术参数原始数据,运用解析的最后用力技术单腿支撑和双腿支撑阶段时间、人体与器械质心速度变化,以及器械质心高、低点出现时机等多种技术参数,揭示掷铁饼最后用力技术中人体－器械系统的运动学特征,并提出相关结论和建议,为教学、训练和科学提供定量化参考依据。 相似文献
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A predominant archery coaching tenet holds that the most effective means of releasing the bow string is by relaxation of the finger flexor muscles without activation of finger extensors. To evaluate the validity of this view, EMG patterns of the flexor digitorum superficialis and extensor digitorum muscles of the draw arm were examined using surface EMG electrodes in 15 highly skilled archers as each performed six shots. Each archer displayed consistent EMG patterns from shot-to-shot and two distinct flexor-extensor patterns were exhibited by the sample. The first, characterized by eight of the archers, supported the relaxation principle. For these archers, both flexor and extensor digitorum activity decreased markedly immediately prior to or at arrow release. The second pattern, characteristic of the remaining seven archers, contradicted the coaching tenet. While the flexor digitorum pattern was essentially the same as that described for the first pattern, the extensor digitorum displayed a marked increase in activity just prior to release, indicating that string release was facilitated by an active extension of the fingers. It was concluded that highly skilled archers do not predominantly reflect a release consistent with the coaching canon and that factors other than the string release mechanism discriminate the performances of skilled archers. 相似文献
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Fine body movements and the cardiac cycle in archery 总被引：3，自引：1，他引：2
This study examined the relationships between postural sway, aiming time, the cardiac cycle time and the placement of the first finger movement within the electrocardiac cycle, with the quality of the arrow shot. A small group of elite male and female archers who shot either the recurve or the compound bow, freestyle or bare bow was used in this study. A total of 240 arrows were shot, classified as being of good, average or bad quality and analysed in detail. The analyses were undertaken over two occasions up to 100 days apart. The area of postural sway, as measured by the movement of the centre of pressure coordinates, varied significantly (P less than 0.05-0.001) both within and between trials for all archers and for all quality of arrows shot. There was a tendency for the area of postural sway to increase as the quality of the arrow shot decreased. This increase in postural sway exceeded, for arrows of bad quality, that exhibited as normal postural sway when standing relaxed and addressing the target with the hands at the side. Aiming time was variable within the quality of arrow shot, although it was consistent for each archer. In some cases the aiming time increased as the quality of the arrow decreased, whereas in the case of bare bow archery the aiming time tended to decrease as the quality of the arrow deteriorated. The cardiac cycle time increased significantly (P less than 0.05-0.01) as the archers approached the loose of the good quality arrows but there was no significant increase in cardiac cycle time when arrows of average or bad quality were shot. The most consistent parameter related to the quality of the shot was the placement of the first finger movement within the ST phase or the mid-cycle phase of the electrocardiogram for arrows of good quality (P less than 0.0001). 相似文献
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AbstractThis paper aims to interrogate the key policy factors behind South Korea’s archery success. Based on our review on the history of Korean archery, two additional key elements in terms of organization and administration were also included to form the analytical framework of this research, aside from Green and Houlihan’s four key policy elements. Our analytical framework is thus comprised of two background elements for elite sport development – the organizational structure and administration, and four areas of elite sport policy. According to our analytical framework, this paper highlights four key policy dimensions that have influenced South Korea’s archery success, as follows: (i) establishment of the Korean Archery Association (KAA) and the involvement of business elites; (ii) emergence of potential full-time archers by the identification of, and the support for, young talented athletes; (iii) developments in sport science, coaching, and facilities/equipment; and (iv) the provision of more systematic competition opportunities for elite-level archers. In summary, the success of Korean archers might be closely linked to the result of the KAA’s staunch strategy and policy initiatives encouraged by the government for international sporting success and the way in which the organization has paid more salient attention to the policy commitments as noted above. 相似文献